We have been asked many times if there are ways to tell if a gripper was tampered. I think the community in general would benefit from this information. The bottom line is there are things you can look for, but many concerns people have are actually normal details. And even if you know what to look for, you are not likely going to see the evidence on video. You really need to have the gripper in hand and maybe be allowed to take it apart or take measurements in a rating device.   Worth stic